Carrying one of Dans 2013 SOX , big thanks for the spares to Dan, I also now have 6 unused brand new ones to keep this going for years now!

Great too see perfectly suited to it these (in 70W SON) are disappearing fast locally with the LED rollout

Something we didn’t even have here in our part of Cheshire?, most of our SON days were 2600s

This one Dan.

This one looks really clear I’m surprised it only did 7 month. Can you get a picture of the lamp close up how it looks now

I do one later, (back at work today), but given how red the discharge was, (for a Philips), and the banding is a heavy sandy colour, I reckon this has already done 4 years plus?, but it just didn’t come on the night of the 27th? And with it being totally dark by the time I noticed it, there was just the faintest glow around the cathodes until I touched the lamp, at which point it fired up, I pondered if it could have been a dodgy lamp holder with a loose connection?, but it’s started perfectly for 7 months! What caused that deep red colour though?, I’ve only seen it on Philips lamps of 135/180?, and Thorn lamps with 15,000 plus hours on the clock?, never on a Philips of this size?, maybe the pressure is too great in it?

Seems strange for a 35w to go bright red. All I can think is that it leaked out a little bit of the sodium from the arc tube somewhere and into the outer jacket, looking at that lamp in this pic I’d have expected longer!

No, I don’t think there was any leak?, as it re-lit when I touched it?, so technically it’s still working?, I’ll bring it to one of the meets so we can investigate? But I have this rule with discharge lamps, if it can start on its own in a fitting it has to come out, or I’d be just going outside every night, tapping the lantern with a yard brush to get it to work!

Yes I’d like to see what’s gone on with this? Seems strange for it to fail the way it has. Does it look knackered?

Bad lamp holder can sort of micro-weld to a small point on the lamp contact and work like that for a while, then one day be dsturbed (from wind or vibration) and lose this contact point. The glow could be the ignitor being able to push some pulse past the bad connection without actually welding it good again, so once the pulse is over the line voltage still can't keep the arc

This is on autoleak transformer , vibration is possible I suppose, but not wind, there’s absolutely no movement on this wall bracket with it being so short and bolted to the wall as there would be with it being on the end of a spigot arm.